Clamp applicable to fastening the teeth of harrows and other agricultural implements.



' N0- 895,47.5. PATENTED AUG. 11, 1908- v 0. LA DOW, DBGD.

3; A. LA DOW, EXBGUTBII.

CLAMP APPLICABLE TO FASTENING THE TEETH 0F HARROWS AND OTHER APPLIOATION TILED AUG. 6,1904

AGRICULTURALIMPLEMBHTS.

UNITED STATES.

PATENT OFFICE.

' CHARLES LA DOW, OF ALBANY, NEW YORK; ROBAH ALICE LA DOW EXECUTRI'X OF SAID CHARLES LA DOW, DECEASED.

CLAMP APPLICABLE TO FASTENDTG THE TEETHCF HARROWS AND OTHER AGRICULTURAL mPLEMEN TS.

retested Aug. 11, 1908.

App1ication'flI'd-A ugust6,1904. Serial No. 219,748.

To all whom it may concern: I

Be it known that I, CHARLES LA Dow, a citizen of the United States, and a resident of Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Clamps Applicable to Fastening the Teeth of IIarrows and other Agricultural Implements, of which the following is a specification.

My invention relates to clamps and consists in improvements which adapt them especially for fastening the teeth of agricultural implements in place, so as to render them easily adjustable relatively to their su )ports, without the use of bolts or nut-s.

n the drawings, Figure 1 represents an end view of a harrow tooth bar having my invention applied thereto, and to a harrowtooth mounted on said bar; Fig. 2 illustrates a plan view of Fig. 1; Fig. 3 illustrates a blank from which my clamp is constructed; Fig. 4 illustrates a perspective view of my clamp detached.

I construct my clamp from a blank of flat steel, of suitable width and thickness, and preferably of such material as will take a spring temper. This blank, C, is perforated in two places, one of said PEIIOISLUODS' being a square hole,D, made diamond-wise in said blank, the other perforation, E, being -made somewhat elliptical in form and having scolloped edges, shown ate e e e, which constitute biting edges, for thepurposes hereinafter described.

The spring, C, is bent into the form shown in Fig. 1, having a curved portion, F, which has flanges f f,- which reinforce the spring across its weakest point in hole E. The

other end of spring, C, has a hook, G, also shown in Fig. 1, which enables said spring to be self-gripping to a harrow tooth bar or beam, as c early shown in Fig. 1.

The bar or beam, A, is perforated in such manner as to freely admit a tooth to readily enter and substantially fill said perforation. The parts A, B, and C, are as; sembled by locating the hooked end, G, of the spring, 0, on the edge of the bar or beam, A, the point of the harrow tooth is then in sorted in hole, E, and )assed downward through the hole I) in the harrow bar or beam and spring, thus bringing the parts into the position shown in Fig. 1. The tooth, B,

may be driven downward into this position,

or an instrument may be ap lied to the upper end of the spring at F 8.1 the spring can then be con'ipressed, as shown by dotted lines in Fi 1, and when said spring is thus compressed, the scalloped biting edges, e relax their grip on the body of the tooth and the tooth can he slid freel u )wardly and downwardly through the ho es and E.

It will be observed that the spring, C, formed substantially as shown, and assembled in substantially the manner de scribed, forms what might be termed a. friction ratchet, which prevents the slightest upward movement of the tooth relatively to beam, A, but readily )ermits downward movement of said tooth re a'tively to beam, A.

It will also be observed that the scalloped edges 6 bite into the body of the tooth and not at the edges of the tooth, whereby the body portion of the tooth is made to take the wear and the corners of the tooth are kept from becoming roughened, which would occur if the spring had con tact with the corners of the tooth. This fastening has but few parts, holds a tooth very securely, enables said tooth to be quickly inserted, adjusted, or withdrawn, without the use of bolts, nuts, or supplementary binders. My fastening is also free from the liability to catch rubbish, because it conforms to the shape of the bar or beam to which it is applied.

I have shown the fastening as applied to a square spike tooth, but said fastening will hollrll a round tooth, or other form equally we I have illustrated and described my invention as mounted on an angle bar or beam, but it can obviously be applied to supports of other forms, and I do not imit myse to any special or peculiar shape of tooth which may be held therein, nor to any peculiar shape of bar, beam, or other support, on which my spring may be mounted, nor do I confine myself to any particular type of machine, implement, or article which may be used in connection with my clamp, but I claim broadly all the forms of construction in which myclam may be embodied and all the uses to whic 1 it may be put, whenever and whereever found.

I claim 1. In combination with a supporting bar or beam, a clamp for fastening another member thereto, consisting of an elastic plate fashioned to engage at one end with the bar or beam and having a spring portion bent to overhang the suppoitengagmg portion, said clamp having two BIfOlfit-IOHS whose centers are substantial y in alinement; and a member passin through said perforations and held in the c lamp and locked to the beam or su port througlrthe cramping or binding 0 the spring portion of the clamp, tending to move away from the support-engaging portion.

2. In combination wit-h a supporting bar or beam and with a tooth or member to be secured thereto, a clamp having a hook portion, said portion lying normally parallel with a wall or face of the support, and another and elastic portion normally oblic no to said face of the support, both portions eing perforated, substantially as shown, and.

the tooth or member to be held passing through said perforations, and through the bar, and being cramped or gripped b the walls of the elastic portion of the camp, tending, by reason of its elasticity, to increase its obliquity to the axis of the tooth.

3. In combination with a member to be held, having a polygonal cross section, a clamp having a resilient member provided with a perforation having convei walls or gripping edges substantially as described and shown, whereby said edges are adapted to grip or bite into the llat faces. of the polygonal member midway between the angles or boundaries of said faces, when the resilient member is left free to move into crai'nping osition, thus concentrating the gripping efect upon restricted areas and leaving the angles of the polygonal member free and unmarred.

4. A clamp adapted to cramp or bind a body by being thrown into an oblique or cramping relation thereto, said clamp having a perforation provided with a series of curved walls with their convex faces toward the center of the perforation, said curved walls separated by short intervals, as and for the purpose set forth.

5Q In eombinat-ionwith a supporting bar or beam, a spring clamp C, having a hook G to engage said supporting bar or beam and a resilient portion overhanging the same, said.

clamp being provided with perforations D and E, and a tooth or member B through the perforations D, E, and tirou 'h the beam, and secured in position by tie cramping or binding of the walls of the perforation E incident to the tendency of the spring portion of the clamp to resume its normal shape or position.

(i. As a new article of manufacture, a clamp comprising a rigid )ortionhaving a hook G am a perforation and a resilient portion bent to stand obliquely to the rigid portion and provided with a perforation E.

7. As a new article of manufacture, a clamp having a rigid portion provided with a hook by which to engage a supporting bar or beam and with a perforation l), and a resilient portion bent to occupy a position oblique to the rigid portion, said resilient or- .tion having a perforation E, and flanges in that portion of its lengt 1 occupied by the perforation E, substantially as and for the purpose set forth.

S. .In combination withasupporting bar or beam A, a clamp C, having a hook G to engage said beam, and provided with a perforation D, and having also a\re; lient portion C, )rovided with a perforatio rilfl, and a tooth )assing through the perforations D, E and l ing bar or beam through t 1e tendency ,of the resilient portion of the clamp to movolfrom the position into which it is forced in inserting the tooth, to the position which it normally occupies.

In testnnony whereof I have signed my" name to this specification in the presence of two subscrlbmg witnesses.

A. M. PARKINS, E. II. PARKINS.

assing ield to the clamp and the support 

